ANATOMY IN A NUTSHELL. 583 



Pterygo-Maxillary Region. 



Pterygoideus externus.— Pterygoid branch of the Inferior maxillary 



division of the fifth nerve Page 529 



Pterygoideus internus. — Pterygoid branch of the Inferior maxillary 



division of the fifth nerve Page 529 



Superficial Cervical Region. 



Platysma myoides. — Facial Page 5 15 



Sterno-cleido-mastoid. — Spinal accessory, second and third (?) cervi- 

 cal nerves Page l" 



Infra-Hyoid Region. 

 (Depressors of the Os hyoides and the Larynx). 

 Sterno-hyoid. — Branches from the loop of communication between the 



cervical plexus and twelfth cranial nerve Page 40 



Sterno-thyroid. — Branches from the loop of communication between 



the cervical plexus and twelfth cranial nerve Page 41 



Thyro-hyoid. — Hypoglossal nerve Page 550 



Omo-hyoid. — Tenth, twelfth, and cervical plexus Page 59 



Supra-Hyoid Region. 

 (Elevators of the Os hyoides and the larynx.) 

 Digastric. — Posterior belly gets the facial, and the anterior belly gets 



mylo-hyoid branch of inferior dental nerve Page 521 



Stylo-hyoid. — Facial Page 522 



Mylo-hyoid. — Mylo-hyoid branch of inferior dental of fifth nerve Page 5 I 1 



Geniohyoid. — Hypoglossal nerve Page 5 1 1 



Lingual Region. 

 (Muscles of the Tongue.) 



Genio-hyo-glossus. — Hypoglossal nerve Page 5 I I 



Hyo-glossus. — Hypoglossal nerve Page 551 



Stylo-GLOSSUS. — Hypoglossal nerve Page 522 



Chondro-glossus. — Hypoglossal nerve Page 550 



Inferior lingualis. — Hypoglossal nerve Page 551 



Superior lingualis lies near the upper surface of the tongue passing 



from base to apex. Its action is to shorten the tongue and make ii concave 



longitudinally. 



Nerve Supply.— Hypoglossal. 



Blood Supply. — Same as tongue. 



Transverse lingualis runs from the median raphe of the tongue to the 



dorsum and margin. Its action is to increase the length of the tongue, at the 



same time make it narrow. 



X kkye Sui'i'M . I lypoglossal. 



Blood Supply.- Same as tongue. 



Vertical lingualis consists of fasciculi which pass from the dorsum ol 



the tongue to its under surface. Its action is to make the tongue Ik'it and 

 broad. 



Nerve Supply.— Hypoglossal. 



Blood Supply. — Same as tongue. 



